The three vectors a b c point from the origin o to the three corners of a triangle use results of problem 1.18 to show that the area of the triangle is given by

Rachel is studying the population of a particular bird species in a national park. she observes every 10th bird of that species that she can find in the park. her conclusion is that the birds living in the park who belong to that species generally feed on insects. rachel's sample is . based on the sample she picked, rachel's generalization is